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       CODE: 504.682-014 Buy the DOT:Download/CD-ROM
TITLE(s): CASE HARDENER (heat treating) alternate titles: carbonizer; carburizer
Controls furnace to harden surface of steel objects, using any of following methods: (1) Places
objects in wire basket and immerses them in heated chemical bath, such as sodium cyanide. (2) Packs
objects in metal boxes filled with carbonaceous material, such as coke, coal, bone charcoal, or
barium carbonate, and charges boxes into furnace. (3) Charges objects into furnace and opens valves
to circulate carbon-rich gas, such as methane, around objects during heating process. Removes
objects from bath or furnace and quenches objects in oil, water, or brine, or allows objects to cool
to predetermined temperature before quenching, depending on metal properties specified. May be
designated according to article case-hardened as Die Case Hardener (heat treating); or by process
used as Cyanide Furnace Operator (heat treating).
GOE: 06.02.10 STRENGTH: M GED: R3 M3 L2 SVP: 4 DLU: 77
ONET CROSSWALK: 91932 Heat Treating, Annealing, and Tempering Machine Operators and Tenders, Metal and Plastic
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